Improved die for bending equalizing-bars



Icompanying drawings,

A.. E. BARNARD, or AKRON, OHIO. Leners Patent Nq. 66,629, daad Femm 9,186e.

DIPROVED DIE POR IBENDING- EQUALIZAING-BARS.

The Schedule referred to inl these Letters Patent and making part of thelamo- To all wlwm it ma/y conce/m Be it known 'that I, A. E. BARNARD, ofAkron, in the county of Summit, and State of Ohio, have invented certainnew and useful Improvements in De,- vices for Bending Equalizing-Bars;and I do hereby declare that the following is a full and completedescription of the same, reference being had to the. acmaking part ofthis specification, in which- Figure 1 is a sideview of the apparatus.

Figures 2 and 3, detached sections.

Like letters of reference refer to like parts in the several views.'llienature 'of this invention relates to a formingblock, or die,wherein are forged r shaped equalizing bars, so that apy number of barsmay have one equal length and an exact curvature.`

In fig. l, A represents ablock or lower die,in which is cut a groove, B,ig.3, the depth of said groove being equal to the difference of thewidth and thickness of the bar.

C is a steadying-bar, proceeding outwardfromthe block, and in which itis secured', so that the u'pper edge of the same shall be even with thebottom of the groove. l

1t will be observed that the upper side of the block or die islcurved,so also the groove cut therein, said curve being that required to begiven to each end of the equalizing-bar, as shown at D, g. l.

E, fig. 1, is an upper die, or hammer, the face of which is curved s()as to correspond with that of the die A. The face of the upper die isplain and smooth, there being no groove cut therein, as shown in thelower one.

Equalizing-bars are usually made by hammering them into shape, givingthe proper curve by bending the bar over some` rounded corner. Thismanner of forging them is one of great labor, and very uncertain in itsresults, as the bars are not all bentof` the same curve Without greatcare being exercised in the operation.

To avoid this'trouble, labor, land expense, is the purpose f theabove-described apparatus, the practical operation of which is asfollows:

A bar of iron, of the proper length and thicknessv for anequalizingfbar, is prepared, one

end of which being heated, the bar is then' secured tothe steadyingarmO,- by means of lthe, strap G, which is made fast thereto by means ofthe' key yand gib H, the heated end resting in the groove B in the thickpart 'of the by the forming-hammer E,

block. It is then bent operated by a tilt in the ordinary way, which, bya succession of blows, bends the end down into ythat section of thegroove cut in the reduced Vend of the block, thereby giving to the barthe exact curve required.

`That portion of the width" of the bar above the groove being equal tothe thickness of the bar, brings the face of the hammer parallel to theface of the block or die A when the bar 4is bent; hence the blows ofthehammer will be given to the entire face thereof. Therefore, whenthe baris laid dat upon the die, for straightening and smoothing o after beingbent, it will'receive the blows of the hammer horizontally, or parallelwith the face of the die;hence, the bar will be of a uniform thickness,which would not be the case if the blows were given at an angle to theface ofthe block.

It will be observed that the ,width ofthe groove is greater at the rearend than at the front, to allow the metal to expand, and therebyincrease its thickness and strength.

Onevend of the bar having been formed, the opposite end is now heated inthe same way by placing the bar again upon the arm 0,' so as to bringthe curve yat D, in exact relation to that given to the end ofv the arm,which answers as a gauge, whereby the length of the bar is determined.

By this means any number of equalizing-bars can be forged," all of thesame length, and of a uniform curvature, which cannot be done in theordinary way without the use ders the bars much more expensive'than whenforged -in the dies, as above described.

. What I claim as my4 improvement, and desire to secure by LettersPatent, is-

The dieorblock A, groove B, and steadying-bar, or

arm, C, in combination with the hammer E, for the 'purpose specified. 4A. E. BARNALRD.

Witnesses:V

J. H. Brummen, ALLAN T. BRINSMADE.

of much time and skill, which ren.

